/Engine/Plugins/Experimental/ScreenReader/Source/ScreenReader/Public/GenericPlatform/ScreenReaderUser.h
Sets the speech rate text to speech will speak at for this user. Passed in value is clamped between 0.0f and 1.0f.FScreenReaderReply::Handled()if the speech rate is successfully set. Else,FScreenReaderReply::Unhandled()is returned.
[FScreenReaderReply](API\Plugins\ScreenReader\GenericPlatform\FScreenReaderReply) SetSpeechRate ( float InRate )